Rotary tooth-brush.



0. C. HANEY.

ROTARY TOOTH BRUSH. APPLICATION FILED NOV-16, 191:

1 ,204,76Q. Patented Nov. 14, 1916.

OLIVER CLAUDE HANEY, OF LOS ANGELES, CALIFORNIA.

ROTARY TOOTH-BRUSH.

Application filed. November 16, 1915.

To all whom/it may concern Be it known that I, OLIVER C. Hanna, acitizen of the United States of America, and a resident of Los Angeles,in the-county of Los Angeles and State of California, have inventedcertain new and useful Improvements in Rotary Tooth-Brushes, of whichthe following is a specification. nThis invention relates toimprovements 1 tooth brushes.

The object of the invention is to provide a simply constructed,efiicient device of this character in which the partsmay be readilyassembled and detached for cleaning and other purposes.

With this and other objects in View, the invention consists of certalnnovel features of-construction, combination and arrange ,ment of parts,as will be hereinafter more I particularly described and claimed.

same in diameter In the accompanying drawings, Figure 1 represents aside elevation of the complete brush assembled ready for use; Fig. 2 isa longitudinal section thereof; Fig. 3 is a detail longitudinal'sectionof the inner end of the outer sleeve or shell; Fig. t is a similar viewof the connected ends of the worm rod and brush; Fig. 5 is an endelevation of the brush.

In the embodiment illustrated, an outer open ended shell 1 is shown, theopening at the front end thereof being reduced as shown at 1'? andshouldered at the inner end of said opening as indicated at 2 with anannular flange 3 spaced longitudinally from said shoulder 2 to form achamber 4; for a purpose to be described.

in inner sleeve 5 is mounted to slide in the shell 1 and forms a hollowplunger open at both ends, the front end thereof having a reducedangularopeningfi which is designed to receive a worm rod 7; This wormrod 7 has a threaded socket 8 at its rear .end in which is mounted aheaded screw 9. The head of this screw 9 is substantially the as theinner diameter of the hollow plunger or sleeve 5 and is designed to forma disk-shaped guide for said plunger whereby the rod is retained incentrally disposed position therein. The front This flange 11 is alsodesigned to be Specification of Letters Patent.

rotary brushes and more particularly to yond its threaded rear end 13.

Patented Nov. 1d, 1916.

Serial No. 61,858.

disposed in the chamber 4 formed between the shoulder 2 and flange 3 ofthe outer shell, whereby the rod is held against longitudinal movementand yet is free to rotate. This coupling sleeve 12 is about twice aslong as the threaded extension 10 of the rod 7 more or less and thefront end thereof is designed to receive the threaded rear end 13 of theshank or spineld of the cleaning brush, whereby the brush is dotachablyconnected with the rod 7. This brush is preferably cylindrical in formwith the bristles 15 thereof radiating from the spine 14 be- This spine14.- projects at its front end beyond the bristles 15 to form a bearing16 for turning in a suitable journal to be described.

An end cap 17 is designed to fit within the outer shell 1 and has areduced threaded extension 18 adapted for engagement with the rear endof the inner sleeve or plunger 5 whereby said plunger is connected withsaid cap to provide for its reciprocation within the shell 1 by means ofwhich rotary motion is imparted to the brush owing to the engagement ofthe angular opening 6 of said plunger with the worm rod 7. The cap 17has an annular shoulder 19 which is designed to abut against the rearend of the shell 1 when the parts are assembled in position as is shownclearly in Fig. 2 so that when the parts are assembled and ininoperative position, the outer shell, 1 and the cap 17 will form acontinuous apparently unitary structure similar in appearence to afountain pen.

A protecting hood 20 is mounted on the front end of the shell 1, thebrush incasing portion 21 of which is semi-circular in transversesection and is designed to protect the tary brush as is shown clearly inFig. 2 to Insure the proper positioning of the brush and to prevent itfrom becoming deflected when in use.

From the above description, it will be obvious that this brush whilesimple in constructlon, is very efi'cacious m use and the parts thereofmay be readily detached for cleaning or other purposes and the brushwhen Worn may be detached from its operating worm rod and a new brushsubstituted Without any of the other parts being changed I claim as myinvention:

In a rotary tooth brush, a cylindrical outer casing having areducedopening at its front end With a shoulder at the inner end of saidopening, an annular member arranged inside said casing and spaced'inward from said shoulder, an inner sleeve mounted to reciprocate insaid outer casing and having an angular opening at its front end, a Wormrod extending through said sleeve and carrying'a radial flange disposedbetween the shoulder and annular member with the rear end of said firstmentioned sleeve to provide an operating handle therefor, and a mouthprotecting hood engaged with said outer casing and extending over saidbrush.

September 17, 1915.

OLIVER CLAUDE HANEY.

